7.1 Angles of Polygons

Front

What is the sum of the interior angles of a polygon with n sides?

Back

The sum of the interior angles of a polygon with n sides is (n - 2) × 180°.

Front

What is the measure of each interior angle of a regular polygon with n sides?

Back

Each interior angle of a regular polygon with n sides is ((n - 2) × 180°) / n.

Front

What is the measure of each exterior angle of a regular polygon with n sides?

Back

Each exterior angle of a regular polygon with n sides is 360° / n.

Front

What is the sum of the exterior angles of any polygon?

Back

The sum of the exterior angles of any polygon is always 360°.

Front

What is a regular polygon?

Back

A regular polygon is a polygon with all sides and all angles equal.

Front

How many sides does a nonagon have?

Back

A nonagon has 9 sides.

Front

How many sides does a decagon have?

Back

A decagon has 10 sides.

Front

What is the measure of each interior angle of a regular octagon?

Back

Each interior angle of a regular octagon is 135°.

Front

If one interior angle of a regular polygon is 140°, what is the name of the polygon?

Back

The polygon is a nonagon.

Front

What is the value of x if the interior angle measures are 70°, 80°, and x° in a triangle?

Back

x = 30°.